High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids.
Hans Huebl,Christoph W. Zollitsch,Johannes Lotze,Fredrik Hocke,Moritz Greifenstein,Achim Marx,Rudolf Gross,Sebastian T. B. Goennenwein +7 more
TLDR
The observation of strong coupling between the exchange-coupled spins in a gallium-doped yttrium iron garnet and a superconducting coplanar microwave resonator made from Nb demonstrates that exchange-Coupled systems are suitable for cavity quantum electrodynamics experiments, while allowing high integration densities due to their spin densities of the order of one Bohr magneton per atom.Abstract:
We report the observation of strong coupling between the exchange-coupled spins in a gallium-doped yttrium iron garnet and a superconducting coplanar microwave resonator made from Nb. The measured coupling rate of 450 MHz is proportional to the square root of the number of exchange-coupled spins and well exceeds the loss rate of 50 MHz of the spin system. This demonstrates that exchange-coupled systems are suitable for cavity quantum electrodynamics experiments, while allowing high integration densities due to their spin densities of the order of one Bohr magneton per atom. Our results furthermore show, that experiments with multiple exchange-coupled spin systems interacting via a single resonator are within reach.read more
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Interplay of magnetization dynamics with microwave waveguide at cryogenic temperatures
Igor A. Golovchanskiy,N. N. Abramov,Marco Pfirrmann,T. Piskor,Jan Nicolas Voss,D. S. Baranov,Razmik A. Hovhannisyan,Vasily S. Stolyarov,C. Dubs,Alexandre Avraamovitch Golubov,Vladimir Ryazanov,Alexey V. Ustinov,Martin Weides +12 more
TL;DR: In this paper, a hybrid system consisting of thin epitaxial magnetic film coupled with a superconducting planar microwave waveguide was studied at low temperatures in a low temperature environment.
Journal ArticleDOI
Interferometric control of magnon-induced nearly perfect absorption in cavity magnonics.
J. W. Rao,P. C. Xu,Yongsheng Gui,Yi-Pu Wang,Y. Yang,B. M. Yao,J. Dietrich,Greg E. Bridges,Xinyuan Fan,Desheng Xue,Can-Ming Hu +10 more
TL;DR: By exploiting magnon-mediated interference between two internal channels, both reflection and transmission of an on-chip cavity magnonic device can be suppressed to zero, resulting in magnoninduced nearly perfect absorption (MIPA) as discussed by the authors.
Journal ArticleDOI
Nonlocal collective ultrastrong interaction of plasmonic metamaterials and photons in a terahertz photonic crystal cavity
TL;DR: A new way to realize strong light-matter interaction is reported by coupling metamaterial plasmonic "quasi-particles" with photons in a photonic cavity, in the terahertz frequency range, by applying the quantum electrodynamic formalism to the density dependence of the polariton splitting.
Journal ArticleDOI
Strong coupling-enabled broadband non-reciprocity
TL;DR: In this paper, a hybrid microwave cavity is used to achieve broadband non-reciprocity in the 0.5 GHz frequency band, which outperforms by two orders of magnitude the previously achieved bandwidth.
Journal ArticleDOI
Magnon antibunching in a nanomagnet
TL;DR: In this paper, the authors demonstrate that a single-magnon state is accessible in a wide class of low-damping magnetic nanoparticles at low temperatures and that this may boost its use in quantum information processing.
References
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Journal ArticleDOI
Coherence in Spontaneous Radiation Processes
TL;DR: In this article, the authors considered a radiating gas as a single quantum-mechanical system, and the energy levels corresponding to certain correlations between individual molecules were described, where spontaneous emission of radiation in a transition between two such levels leads to the emission of coherent radiation.
Journal ArticleDOI
Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics
Andreas Wallraff,David Schuster,Alexandre Blais,Luigi Frunzio,Ren-Shou Huang,Ren-Shou Huang,Johannes Majer,Sushant Kumar,Steven Girvin,Robert Schoelkopf +9 more
TL;DR: It is shown that the strong coupling regime can be attained in a solid-state system, and the concept of circuit quantum electrodynamics opens many new possibilities for studying the strong interaction of light and matter.
Journal ArticleDOI
Introduction to quantum noise, measurement, and amplification
TL;DR: In this paper, a pedagogical introduction to the physics of quantum noise and its connections to quantum measurement and quantum amplification is given, and the basics of weak continuous measurements are described.
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Circuit quantum electrodynamics in the ultrastrong-coupling regime
T. Niemczyk,Frank Deppe,Hans Huebl,Edwin P. Menzel,Fredrik Hocke,M. J. Schwarz,Juan José García-Ripoll,David Zueco,Thomas Hümmer,Enrique Solano,Enrique Solano,Achim Marx,Rudolf Gross +12 more
TL;DR: In this article, it was shown that the Jaynes-cummings model breaks down in the regime of ultrastrong coupling between light and matter, and that higher-order processes are possible.
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Demonstration of two-qubit algorithms with a superconducting quantum processor
Leonardo DiCarlo,Jerry M. Chow,Jay M. Gambetta,Lev S. Bishop,Blake R. Johnson,David Schuster,Johannes Majer,Alexandre Blais,Luigi Frunzio,Steven Girvin,Robert Schoelkopf +10 more
TL;DR: A two-qubit superconducting processor and the implementation of the Grover search and Deutsch–Jozsa quantum algorithms are demonstrated and the generation of highly entangled states with concurrence up to 94 per cent is allowed.